How to best implement Level Of Detail models?

kzest

Is there a property/setting in Godot for implementing LOD based rendering? There's definitely something in the GeometricShape class but I can't figure out how to use it. Please direct towards any existing samples or provide some suggestions.

kzest

That's GeometryInstance class. Sorry for the incorrect class name above. GeometryInstance is mentioned in the documentation as below:

<h3>Level of detail (LOD)</h3> As also mentioned before, using objects with less vertices can improve performance in some cases. Godot has a very simple system to use level of detail, GeometryInstance based objects have a visibility range that can be defined. Having several GeometryInstance objects in different ranges works as LOD.

and its inherited by: Inherited By: MultiMeshInstance, SpriteBase3D, MeshInstance, Particles, Quad, TestCube, ImmediateGeometry That would mean every mesh can have a Level Of Detail implementation :smile: Could someone please tell how to implement it?

Schuster

Welcome,kzest! Lod in Godot is quite simple and well resolved, you must of course do a different versions of the model and import them. ....then the set distance according to your needs and for use in the game is needed the script for disable/enable visibility  LOD levels of the model. I'm not a scripter and yet I also not tried in game. :) note: ....of course, even textures edit by lod-for example, lod1- 1024 x 1024 , lod2 - 256 x 256 , lod3 - 128 x 128

Schuster

model LOD Range Begin - lod1 0-10---- lod2 10-40 and  lod3  40-250 ......for example <img title="Image: https://s6.postimg.io/fx9hfra3l/c_lod02.jpg" alt="" src="https://s6.postimg.io/fx9hfra3l/c_lod02.jpg">

kzest

Thank you :smile: I got it. I understand now that we can use these GDScript functions too: float     get_draw_range_begin ( ) float     get_draw_range_end ( ) void     set_draw_range_begin ( float mode ) void     set_draw_range_end ( float mode )

Sakaki

<a target="_blank" rel="nofollow">Bishop</a> said:

model LOD Range Begin - lod1 0-10---- lod2 10-40 and  lod3  40-250 ......for example <img title="Image: https://s6.postimg.io/fx9hfra3l/c_lod02.jpg" src="https://s6.postimg.io/fx9hfra3l/c_lod02.jpg" alt="">

</blockquote> So we can just set a single Spatial node and set MeshInstances as LOD and just set their render range? Wow, that's...couldn't be easier tbh <img src="https://godotdevelopers.org/forum/resources/emoji/open_mouth.png" alt="open_mouth" height="20">

Schuster

I am glad that I helped a little bit :) ...if you will have the little time could you on a simple model with this script, put together a scene with FPS camera and put here the link to download.... for beginners, it would be great :) FPS camera by khairul169 : http://github.com/khairul169/godot-cabinet/tree/master/templates/fps-camera or http://github.com/khairul169/godot-cabinet

Sakaki

<img title="Image: https://media.giphy.com/media/11e0LDNU3nMgUw/giphy.gif" alt="" src="https://media.giphy.com/media/11e0LDNU3nMgUw/giphy.gif"> This is awesome

kzest

extends RigidBody func _ready():     get_node("MeshInstance").set_draw_range_begin(0);     get_node("MeshInstance").set_draw_range_end(30);     get_node("MeshInstance 2").set_draw_range_begin(30);     get_node("MeshInstance 2").set_draw_range_end(50);     get_node("MeshInstance 3").set_draw_range_begin(50);     get_node("MeshInstance 3").set_draw_range_end(300);

kzest

Schuster

Great guys! we have an excellent LOD in Godot :) @kzest Thanks very much for script and node settings, excellent work!

kzest

Here's the sample: https://github.com/kzest/GodotEngine-LOD-sample

Schuster

Thanks a lot for sample, very helpful, great work!!

Kiori

Just wanna drop in to say great work guys, this type or cooperation and result is exactly why this forum was built, keep it up! :wink:

Megalomaniak

Yup, awesome, I hadn't even yet thought to start looking into LOD's so this thread has saved me some future time and kudos to you all for that! :)